When it comes to home energy, we often talk about the traditional “payback period” - how many years it takes for solar panels to cover their installation cost. But for retirees sitting on savings, the math looks very different.

With interest rates fluctuating and inflation quietly eroding the value of money in the bank, many homeowners are asking a smarter question: Why leave cash sitting in a bank account when it could permanently wipe out household bills instead?

That was the exact line of thinking for local homeowners Philip and Kim Hawkey, when rising energy prices pushed their daily costs higher and higher. Here's how we helped them turn their savings into energy independence for the rest of their days...

The Challenge: Rising Bills vs. Fixed Income

Frustrated by surging energy costs, Philip and Kim decided it was time to take control of their outgoings. Their initial step was to approach a big national supplier, Octopus Energy. The assessment was carried out entirely remotely using satellite images from Google Earth, and Octopus provided a quick, low-cost quote for a modest 8 to 10 panels.

However, Philip felt this "one-size-fits-all" approach fell short. Knowing that their day-to-day living budget in retirement mattered far more than keeping capital sitting in a bank account, and they wanted to maximise their roof space to get the biggest long-term benefit - so they  turned to Natural Generation for a local, hands-on expert opinion.

Dexter from our team visited the property in person and suggested that the roof could actually hold a substantial 20-panel system; a better system size for Phil and Kim's needs, which would radically boost their potential generation and energy independence.

"For us, our day-to-day budget in retirement is more important than simply preserving the capital we have saved. Investing in solar will immediately make a saving for us and for the rest of our days. Now we don’t have an electricity bill, which makes a huge difference!" - Philip Hawkey

 

The System Solution: Built for Full Independence

To completely eliminate their reliance on the grid, we installed a comprehensive, future-proof setup featuring cutting-edge sodium battery technology:

• 20 x Trina 450W All-Black Solar Panels (9.0 kWp): Sleek, high-efficiency panels that maximise the full roof space, producing an estimated 9,318 kWh of clean electricity per year.
• 1 x North Sea 6kW Inverter: The central brain of the setup, automatically routing solar power to where it is needed most in the home or storing it for later.
• 2 x Eleven Energy Volta Sodium Batteries (9.0 kWh Total Storage): Instead of standard lithium-ion batteries, Philip chose Eleven Energy's innovative sodium-based batteries. Sodium offers an exceptionally eco-friendly, highly sustainable, and cost-effective alternative to rare metals.

The batteries store surplus daylight energy to power the house overnight. As soon as the sun comes up the next morning, the solar panels take over again, powering the home and rapidly topping the batteries back up.

The Performance: Zero Imports and Summer Profits

The system went live in August 2026, and the impact on the household's monthly outgoings was immediate.

• 226% Energy Self-Generated: The 9.0 kWp array produces more than double the total energy the property consumes over the year.
• 100% Grid Independence in Sunny Weather: Thanks to the battery setup, the home imports zero electricity from the grid during summer and shoulder months.
• Smart Grid Export Profits: With a 46% self-consumption rate, the remaining 54% of generation is sold back to the grid. Using the Eleven Energy app, Philip can instruct the system to export up to 50 kWh of surplus power a day during peak rate hours on their Octopus export tariff, turning their system into a steady revenue stream.
• £1,714 Estimated Annual Savings: A massive reduction in living costs that continues year after year, completely insulated from grid price hikes.

"Top job from start to finish, absolutely delighted! We're exporting lots in this sunny weather and importing nothing. The batteries handle all our evening and overnight load, then start topping up quickly as soon as the solar starts generating next morning. Bliss." - Philip Hawkey

 

Why Working Local Matters

Navigating grid permissions, export tariffs, and custom system designs can feel daunting, but working with a local team makes all the difference. From our initial site visit through to final commissioning and export registration, our team made sure the process was seamless.

"Natural Generation were very professional throughout, from the office team through to the technicians carrying out the installation. It was great working with a local company." - Philip Hawkey

 

Ready to Put Your Savings to Work?

If you are retired or planning for the future, investing in solar generation is one of the most effective ways to lower your monthly overheads and protect yourself against rising energy costs.

Contact the Natural Generation team today for a personalised solar survey